Accession number: 86.200.559; Attribution to Jackson based on the photonegative's inclusion in the History Colorado William Henry Jackson Collection.; History Colorado.; Condition: discolored, number etched on negative.; Formerly Jackson 2571.; Hand-lettered title on negative.; Number: "2571" hand lettered on negative.; Title on photonegative envelope reads: "Hagerman Pass, east from tunnel."; R7201005331